Documentation changes

use realization diffCurvPhaseIn2Lin as default for peak budget runs

*.png -> *.PNG

Update tutorials.

new realization of the module 45_carbonprice

Add path_gdx_bau to scenario_config.csv to avoid warning message in s…

Fix minor issues on the edge_esm module

Request to merge the new transport module EDGE-T

so that the autodoc scripts can parse the docstrings.

new CES efficiencies

Add path_gdx_bau to scenario_config.csv to avoid warning message in start.R: In is.na(isettings$path_gdx_bau) : is.na() applied to non-(list or vector) of type 'NULL'

REMIND-MAgPIE coupling: Since there is no reduction of the CO2 price …

update start.R with env shebang and set executable flag

- makes it executable from the command line without invoking Rscript
  explicitly
- saves on typing, makes for more relaxed REMIND work ;)

REMIND-MAgPIE coupling: Since there is no reduction of the CO2 price anymore in MAgPIE also remove it from REMIND.

update MAC costs description with example

add description of calculation of MAC costs in industry module

change the lifetime for biotr in SSP5 so that it is the same as in SS…